<template>
    <div class="tags" v-if="showTags">
        <!-- 标签列表 -->
        <ul>
            <li
                class="tags-li"
                v-for="(item, index) in tagsList"
                :class="{ active: isActive(item.path) }"
                :key="index"
                v-if="item.title != $store.state.projectName+'-'"
            >
                <!-- :to="{path:item.path,query: {name: item.title}}" -->
                <router-link :to="item.path" class="tags-li-title">
                    {{ item.title }} &nbsp;&nbsp;
                </router-link>
                <i class="iconfont icon-guanbi" @click="closeTags(index)"></i>
            </li>
        </ul>
    </div>
</template>
<script>
import bus from "@/commons/bus.js"; // 引入通用组件传值组件
export default {
    data() {
        return {
            tagsList: [], // 存放所有标签
        };
    },
    methods: {
        // 当前选中标签
        isActive(path) {
            return path === this.$route.fullPath;
        },
        // 关闭单个标签
        closeTags(index) {
            const delItem = this.tagsList.splice(index, 1)[0];
            const item = this.tagsList[index]
                ? this.tagsList[index]
                : this.tagsList[index - 1];
            if (item) {
                delItem.path === this.$route.fullPath &&
                    this.$router.push(item.path);
            } else {
                this.$router.push("/");
            }
        },
        // 关闭全部标签
        closeAll() {
            this.tagsList = [];
            this.$router.push("/");
        },
        // 关闭其他标签
        closeOther() {
            const curItem = this.tagsList.filter((item) => {
                return item.path === this.$route.fullPath;
            });
            this.tagsList = curItem;
        },
        // 设置标签
        setTags(route) {
            const isExist = this.tagsList.some((item) => {
                return item.path === route.fullPath;
            });
            if (!isExist) {
                if (this.tagsList.length >= 8) {
                    this.tagsList.shift();
                }
                this.tagsList.push({
                    title: route.meta.title,
                    path: route.fullPath,
                    name: route.matched[0].components.default.name,
                });
            }
            bus.$emit("tags", this.tagsList); // 组件传值
        },
        // 点击标签下拉选项(关闭其他或者关闭所有)
        handleTags(command) {
            command === "other" ? this.closeOther() : this.closeAll();
        },
    },
    computed: {
        // 大于0则显示标签组件
        showTags() {
            return (
                this.tagsList.length > 0 &&
                this.$route.meta.title != this.$store.state.projectName+"-"
            );
        },
    },
    watch: {
        // 当$route发生变化重新赋值
        $route(newValue, oldValue) {
            this.setTags(newValue);
        },
    },
    created() {
        this.setTags(this.$route);
    },
};
</script>
<style >
.tags {
    width: 100%;
    margin: 0 auto;
    position: relative;
    /* position: fixed; */
    height: 60px;
    line-height: 60px;
    overflow: hidden;
    background: #fff;
    padding: 5px 5px 0 5px;
    padding-right: 120px;
    border-radius: 5px;
    box-shadow: 0 10px 25px -10px #6666ff;
    z-index: 1;
}
.tags ul {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
}
.tags-li {
    float: left;
    margin: 10px 5px 2px 10px;
    border-radius: 5px;
    font-size: 12px;
    overflow: hidden;
    cursor: pointer;
    height: 30px;
    border: 1px solid #bdc3c9;
    line-height: 30px;
    background: #e9eaec;
    padding: 0 5px 0 12px;
    vertical-align: middle;
    color: #666;
    box-shadow: 0 0px 10px #5362e1;
    -webkit-transition: all 0.3s ease-in;
    -moz-transition: all 0.3s ease-in;
    transition: all 0.3s ease-in;
}
.tags-li:not(.active):hover {
    background: #f8f8f8;
}
.tags-li.active {
    color: #fff;
}
.tags-li-title {
    float: left;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #666;
}
.tags-li-icon {
    width: 15px;
    height: 15px;
    position: relative;
    top: -1px;
    right: 5px;
    display: inline-block;
}
.tags-li.active .tags-li-title {
    color: #fff;
}
.tags-li.active {
    border: 1px solid #5362e1;
    background-color: #5362e1;
}
a {
    text-decoration: none;
}
.tags-close-box {
    position: absolute;
    right: 0;
    top: 0;
    box-sizing: border-box;
    padding-top: 1px;
    text-align: center;
    width: 110px;
    height: 30px;
    background: #fff;
    box-shadow: -3px 0 15px 3px rgba(0, 0, 0, 0.1);
    z-index: 10;
}
</style>